Can any interrupt accepted if an INC instruction interrupt in process?

Question:

When an INT instruction interrupt, which is a non-maskable interrupt, is in process, can't any other interrupt be accepted?

Answer:

When an INT instruction is executed, the program branches to the INT interrupt process. In the interrupt process, although the I flag goes to the interrupt disable state ("0"), the processor interrupt priority level (IPL) is not changed. Consequently, if a maskable interrupt which has a higher priority level than the IPL is requested after the I flag is set to "1" in the interrupt process, it will be accepted. If a non-maskable interrupt is generated, it will be executed regardless of the setting of the I flag.